Adjustable hot-air boot.



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Patented Dec. 19,1916.

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A. G. SCHERER. ADJUSTABLE HOT AIR B'OOT.

APPLICATION FILED OCT. 5. 19l6- Patented Dec. 19,1916.

ALBERT Gr. SCHERER, OF o IIcAeo, ILLINOIs, 'ASSIGNOR- To ExcnLsIOR STEELFURNACE 1 COMPANY, OF CHICAGO, ILLINOIS, CORPORATION OF ;ILLINOIS.

ADJUSTABLE HOT-AIR BOOT.

of the city of Chicago, county of Cook, and

State of Illinois, have invented certain new and useful Improvements inAdjustable Hot-Air Boots, of which the specification.

In hot-air heating it is the usual practice to run round pipe from thefurnace topipe of rectangular section installed betweenthe studding inthe walls of the building to be heated. The boot is the fitting orsectionof V conduit which serves to make the connection between the pipeof round and rectangular section. The width of studding is'difierent indifferent buildings, which, together with variation in register sizes,creates a demand for pipe of rectangular section of d fferent thlcknessor depth, and heretofore, so far as I am aware, it has been necessary tobuild and carryinstock boots with rectangular pipe connections ofdilferent thicknesses or depths, each difierent dimension of thickusesor depth of rectangularpipe connection requiring a separate stock ofboots, and each dimension of boot requiring separate and differentpatterns.

My present object is to provide a boot the "rectangular pipe connectionof which is capable of adjustment so that it'may be ad'- justed to takeany usual thickness or depth of pipe of rectangular section. I attainthe above object by means of the structure illustrated'in theaccompanying drawings, in

which 1 Figure 1 is aside elevation of a boot embodying my invention,the adjustable portion thereof in deepest or most extended position;Fig. 2 is a fragment similar to Fig. 1,

the adjustable portion thereof being in thinnest or smallestposition;Fig. 3 is a frag-j mentary section showing the adjustable sidein elevation and in an intermediate position. Fig.4 is a plan of thefragment shown in Fig. 3; Fig. 5 is a sectionon line 5- 5 of, Fig. 3;Fig. 6 is a fragmental sectional'view showing a modified form of closingapron. Fig. .7 is a fragmental section similar toFig. 6, showing anothermodification of the closing apron. Fig. 8 is a fragmental elevation,

showing my invention applied to a double Wall boot Fig.- 9 is a sectionof the constructionshown in Fig.8; and Fig. 10 is a sectlonSpecification of Letters Pate t. Application filed'octobe'r 5, 1916:Serial No. 123,897.

following is a Patented Dec.19,1916.

' designed pieces, 12, to taper the boot from theannular collar to therectangular pipe connection, having the relatively long front and backwalls,13 and 14, adapted to extend between the'joist of a wall and therelatively short end walls, 15, adapted to face the sides of adj acentjoist.

The metal; of'the piecexor pieces, 12, is

carried up to formthe back, 14, and'end's, '15, ofthe rectangular pipeconnection, and

the back wall, 14, is provided with a strip of I metal, 16, havingoppositely turned'edges. One turn of the strip, 16, is placed over theplace by diagonal crimping, or in any other suitable manner, so that thestrip extends downwardly from the top of the wall upon the outsidethereof and its turned up-lower edge forms a pocket, 17, for thereception of the edge wall of the section with which it is assembled pThe portion of the tapering .piece or pieces, 12, which abut the frontwall, 13, of the rectangular pipe connection, end at their juncture withthe bottom of the pipe connection portion, and the parts of the pieces,

12, which are extended to form the ends, 15, I

of the rectangular pipe connection in asimilar manner in which the rearwall, 14,' is

formed, are alsocut away at their forward ends, as is clearly shown indotted lines at 18 in Figs. 1 and 3. -Upon the inner faces of the endwalls, 1am secured strips,18, by

rivets, 19, which are preferably passed through the strips, 18, neartheir upper edges so as to permit of the'bottom. of the strips tobe moreeasily sprung away from the inner faces of the end walls,-15. 9

The front wall of, the 'rectangular pipe connection consists ofa'vertical flange, 20,

vided withahorizontal flange or apron, 21,

which serves to close the portion of the top of the boot which wouldotherwise be left connection for a thinner rectangular'pipe.

P The vertical flange, 20, extends considerably of a piece of sheetmetal, which is also pro v 75 top of the back'wall, 14, and is,securedin r and upwardly to on either side and these beyond the apron,21,

extensions, 22, are considerably broader than the end walls of areadapted Fig. 5. The

vided with a strip 16,having a pocket, 17

similar in all respects to the strip,16, having the pocket, 17 providedupon the rear wall, 14:.

It will now be seen that in order to fit the boot for assembly with anybut the thickest pipe of rectangular section, for which the boot ismade, it is only'necessary to press in the front vertical flange, 20,the proper distance. When the front vertical flange, 20, has beenproperly adjusted, it maybe secured in the adjusted position by turningover the exposed ends of the strips, 18, as shown in dotted lines inFig. 4.

If the protrusion of the horizontal flange or apron, 21, be deemedunsightly, it may be extended inside of the tapering walls, as shown at21 in Fig. 6, in which case 1 prefer to provide a pocket for it byriveting a suitably shaped piece of metal, 25, to the inner face of thepiece, 12. The flange or apron, 21, may also be hinged to the verticalflange, 20, so as to swing down by the wall,

12, as clearly shown at 21 in Fig. 7.

I have heretofore described my invention as applied to single wall hotair stack, but it may be equally well applied to, a double wallconstruction, in which case the upper edges of the extensions, 22, arenot provided with pockets, 24, but terminate at the spacers, 25, betweenthe inner and outer walls of the double walled section,

as clearly shown at 26 in Fig. 10. The pocket, 17, is

also omitted from the front vertical wall, 20, i

and instead the piece of metal, 16 is so shaped as to assemble with theedge of a 2 double wall section, as clearly shown in Fig. 9. In thedouble wall construction I also secure an increased rigidity ofstructure by providing vertical flanges, 26", upon the ends of thehorizontal apron, 21, which are engaged byinwardly turned lips, 27,formed.

upon the outer wall of the double walled section.

Having thus described my invention, it

will be apparent to others skilled in this art,

that divers modifications and refinements are possible without follows:7

What I claim as new is j 1. A boot for air conduit having a collardeparting from the scope of the appended claims, which are as adapted toreceive a pipe of circumferential section, and a connection for conduitof'rectangular section comprising rear and side walls, a separate piecehaving front and side walls, and a laterally extending apron, means forslidably connecting the side walls of the separate piece with the sideWalls for the rectangular connection, whereby the latter'al apron willcover the opening produced by the inward adjustment of the separatepiece.

2. A boot for air conduit having a collar adapted to receive a pipe ofcircumferential section, and a connection for conduit of rectangularsection comprising rear and side walls, a separate piece having frontand side walls, and a laterally extending apron, means for slidablyconnecting the side walls of the separate piece with the side walls forj the rectangular connection, whereby the lateral apron will cover theopening produced by the inward adjustment of the sliding iece, and meansfor locking said sliding piece in adjusted position.

3. A connecting unit for conduit one end of which terminates in a collaradapted to receive a conduit of circular section, the other end of whichterminates in extensions adapted to receive conduit of rectangularsection, which last-mentioned end comprises stationary back and sidewalls, a front wall a'djustably connected therewith, an apron carried bythe adjustable front wall whereby the opening produced by the justmentthereof will be covered by the apron. v

- 4:. A. connecting unit for conduit one end of which terminates in acollar adapted to receive a conduit of circular section, the other endof which terminates in extensions adapted to receive conduit ofrectangular section, which last mentioned end comprises stationary backand side walls, a front wall adjustably connected therewith, an aproncarried by the adjustable front wall where by the opening produced bythe inward adjustment thereof will be covered by the apron, and meansfor locking the adjustment of the front wall.

5. A connecting unit for conduit comprislng rear and side walls, aseparate piece having front and side walls, a laterally extending apron,means for slidably connecting the side walls of the separate piece withthe side walls of the connecting unit whereby the lateral apron willcover the opening produced by the inward adjustment of the slidingpiece.

6. A connecting unit for conduit comprise. ing rear and side walls, aseparatepiece having front and side walls, a laterally extending apron,means for slidably connecting the side walls-ofthe separate piece withthe side walls of the connecting unit whereby the. lateral apron willcover the opening produced by the inward adjustment of the slidingpiece, and means for locking the unit in adjusted position.

7. A connecting unit for conduit one end whereof terminates instationary rear and side walls, a front wall adj ustably connectedtherewith, an apron carried by the adjust able front wall whereby theopening produced'by the inward adjustment thereof will be covered by theapron.

8. A connecting unit for conduit one end whereof terminates instationary rear and side walls, a front wall adjustably con- 7 Copies ofthis patent may be obtained for five cents each, by addressing theWashington, D. 0.

nected therewith, an apron carried by the adjustable front wall wherebythe opening produced by the inward adjustment thereof will be covered bythe apron, and means for locking the unit in adjusted position.

Signed at Chicago, county of Cook and E. R. LUNDY, Jr. J. H. JocHUM, Jr.

Commissioner of Patents,

